Cooling arrangement

ABSTRACT

This invention is concerned with a cooling system for a tractor having an air-cooled engine and having a hydraulic fluid transmission. This system includes having a hydraulic fluid radiator through which cooling air is drawn before passing same over the engine for cooling same and wherein such radiator can be pivoted about the longitudinal axis of such tractor to provide ready access to mechanism underlying such radiator and also presenting such radiator to a position where it can be readily cleaned.

United States Patent 1 1 1111 3,727,712 Colloton 51 Apr. 17, 1973COOLING ARRANGEMENT I 3,404,732 10/1968 Mork ..123/41.33 x [75]Inventor: Marcus conmomcedarburgwis; 3,630,003 12/1971 Ashton etal..180/68 RX Assignee: Simplicity Manufacturing Company, Inc., PortWashington, Wis. Filed: Nov. 11, 1971 Appl. No.: 197,693

U.S. Cl. ..180/66 R, 123/41.31, 123/4133, 165/51, 165/76, 180/68 R Int.Cl ..B60k 11/06, B601: 19/14 Field of Search ..165/51, 76; 123/4131,41.33, 41.56; 180/66 R, 68 R References Cited UNITED STATES PATENTS6/1949 Davies ..123l41.33 X 4/1957 8/1967 Couse Gehrke et a1. ..180/68 RPrimary ExaminerAlbert W. Davis, Jr. Attorney-Kenneth C. McKivett et a1.

[ 57] ABSTRACT This invention is concerned with a cooling system for atractor having an air-cooled engine and having a hydraulic fluidtransmission. This system includes having a hydraulic fluid radiatorthrough which cooling air'is drawn before passing same over the enginefor cooling same and wherein such radiator can be pivoted about thelongitudinal axis of such tractor to provide ready access to mechanismunderlying such radiator andalso presenting such radiator to a positionwhere it can be readily cleaned.

4 Claims, 5 Drawing Figures COOLING ARRANGEMENT This invention relatesgenerally to engine cooling systems and more particularly to an improvedarrangement for supplying engine cooling air to an engine after such airhas cooled hydraulic fluid.

A feature of this invention is the using of engine coolin g air to alsocool the transmission hydraulic fluid.

A further object of this invention is the positioning of a fan between afront mounted air-cooled engine and a radiator for cooling transmissionhydraulic fluid.

A further object of this invention is to provide a cooling radiator fortransmission hydraulic fluid which can be pivoted to a handy positionfor servicing mechanism underlying such radiator when in normalposition.

A further object of this invention is to provide a cooling radiator fortransmission hydraulic fluid which can be pivoted to a handy positionfor cleaning out the fin passages of such radiator.

Referring now to the drawings:

FIG. 1 is a side elevation of a tractor embodying the invention, someportions of the tractor have been removed to better illustrate theinvention;

FIG. 2 is an enlarged portion of the tractor as shown in FIG. 1;

FIG. 3 is a section view taken on line III-III of FIG.

FIG. 4 is an enlarged view of a portion of FIG. 2 showing a pivotedsupport for a radiator; and

FIG. 5 is an enlarged view of a portion of FIG. 3 showing a radiator ina pivoted position.

Referring now to the drawing a tractor 5 has an aircooled internalcombustion engine 6. Transmission fluid is circulated through a radiator7 mounted on longitudinally extending main frame 8 at a midportionthereof to the rear of engine 6. Engine 6 is mounted on main frame 8 ata forward portion thereof by conven tional means. A the rear end offrame 8, an operators platform or station 9 is provided. This stationincludes a floor portion 11 attached to frame 8, transversely spacedside members 12v carried by frame 8 and adapted to support operatorsseat 13. Positioned forward of radiator 7 is a suction fan 14 includingblades 16 attached to the rearward end of shaft 17. Shaft 17 isoperatively connected to engine 6 (by conventional means not shown) tobe driven thereby.

A hydraulic pump 18 is carried on a midportion of frame 8 and is drivenby engine 6 through conventional means not shown. Pump 18 providespressure fluid for driving a fluid motor 18A. Bevel gear 183 is attachedto motor 18A to be driven thereby and bevel gear 188 in turn drivesbevel gear 18C, the power input gear of a conventional three speedtransmission 18D shown diagrammatically as a box in FIG. 1 and having apower output gear 18E drivingly connected to gear 18F which is attachedto tractor wheels 19 for driving same. Hydraulic pump 18 and motor 18Ais provided with means for cooling the hydraulic transmission fluidbeing circulated thereby and this means includesconduits 21 and 22connected to motor 18A and pump 18. respectively, and connected toradiator 7 by means of rubber connectors 23 only one of which is shown.

Radiator 7 is provided with a double U-shaped conduit 24. As shown inFIG. 3, one end of conduit 24 is connected to rubber connector 23 fromwhence one leg 24a extends in a semicircular path to a positiondiametrically opposed from such starting point at which point conduit 24is bent in a U-shaped configuration and then the second leg 24b ofconduit 24 then parallels the first leg of conduit 24 returning to apoint of connection with a rubber connector 23. Conduit 24 is providedwith a series of heat dissipating fins 26 which are positioned onconduit 24 to provide radially extending air passages 27 betweenadjacent fins.

Radiator 7 is attached to frame members 28 and 29 by bolts 31 and 32 andretaining members 33 and 34 respectively with bolts 31 and 32 beingthreadably engaged with members 28 and 29 carried by frame 8. Member 28is provided with openings 36 and 37 through which conduits 21 and 22pass through. An additional support for radiator 7 is bracket 38 whichis pivotally supported on cover 39 attached to frame 8.

Tractor 5 is provided with a pivotally mounted hood 41 which is providedwith a front grill (not shown). Hood 41 can be pivoted about transverseaxis 42 when it is desired to service the engine 6 or other tractorcomponents.

Underlying radiator 7 is a clutch mechanism 43 for engine 6 and to gainaccess to such clutch for servicing,

or adjustment, radiator 7 can be pivoted out of the way. This isaccomplished by first raising hood 41, then bolts 31 and 32 andretainers 33 and 34 are removed, radiator 7 can now be pivoted aboutrubber connectors 23 (FIG. 5) in a transverse direction to provideaccess to the clutch mechanism 43. By pivoting the radiator to theposition shown in FIG. 3 the radiator 7 also presents itself forhandycleaning out of the air passages 27 which might be partiallyclogged.

FIG. 2 shows how cooling air is circulated in the tractor to not onlycool the transmission hydraulic fluid but also to cool engine 6. Thearrow 44 in F IG. 2 shows the path of this air. Fan 14 sucks air throughradial passages 27 and thereby cooling the hydraulic transmission fluidand then such air is blown longitudinally over engine 6 and out throughthe forward end of the hood 41 or the sides of tractor 5 forward ofengine 6.

It is to be noted that fan 14 is provided with a surrounding cowling 46provided with an opening 47 providing an air intake opening positionedlongitudinally adjacent and radially positioned inwardly from radiator 7so that fan 14 sucks air through radiator 7 to provide a cooling of thetransmission hydraulic fluid passing through radiator 7. After passingthrough passages 27 the cooling air is then blown over engine 6 to coolsame.

. The embodiments of the invention in which an exclusive property orprivilege is claimed are defined as follows:

I. In combination, a hydraulically driven tractor having alongitudinally extending main frame, an aircooled engine mounted on theforward end of said frame, a semicircular radiator carried by said frameand having radially extending air passages to provide cooling for saidradiator, a fluid pump carried by said frame for moving hydraulic fluidthrough said radiator, a hydraulic motor operatively connected to saidtractor for driving same, said hydraulic motor being drivenly connectedto said pump so that said motor is driven by said hydraulic fluid, saidpump being driven by said aircooled engine, a fan driven by said engineand being positioned longitudinally between said radiator and tor.

3. In the combination recited in claim 2 and wherein said radiator isprovided with said pivotal mounting being provided by means of a rubberhose.

4. In the combination recited in claim 3 and wherein said radiatorcomprises a fluid conduit starting at one end thereof and continuing tothe other end and returning to the first end, a plurality of finsattached to said conduit for dissipating heat.

1. In combination, a hydraulically driven tractor having alongitudinally extending main frame, an air-cooled engine mounted on theforward end of said frame, a semicircular radiator carried by said frameand having radially extending air passages to provide cooling for saidradiator, a fluid pump carried by said frame for moving hydraulic fluidthrough said radiator, a hydraulic motor operatively connected to saidtractor for driving same, said hydraulic motor being drivenly connectedto said pump so that said motor is driven by said hydraulic fluid, saidpump being driven by said air-cooled engine, a fan driven by said engineand being positioned longitudinally between said radiator and saidengine, a cowling carried by said frame and positioned about said fanfor directing air passing radially through said radiator to said fanentrance and longitudinally forwardly over said engine to a point ofdischarge at the forward end of said tractor.
 2. In the combinationrecited in claim 1 and wherein said semicircular radiator is pivotallymounted on said frame so that said radiator may be pivoted outwardlyabout one end portion thereof to provide access to mechanism underlyingsaid radiator and to said radiator.
 3. In the combination recited inclaim 2 and wherein said radiator is provided with said pivotal mountingbeing provided by means of a rubber hose.
 4. In the combination recitedin claim 3 and wherein said radiator comprises a fluid conduit startingat one end thereof and continuing to the other end and returning to thefirst end, a plurality of fins attached to said conduit for dissipatingheat.